Fireplace.



' PATENTED OCT. 16, 1906. J. G. W. PAUL & J. THAU.

2 SHEETS-SHEET 1 FIREPLACE APPLICATION FILED NOV. 20. 1906.

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No. 833.414. PATENTED OCT. 16, 1906. J. G. W. PAUL & J. THAU. FIREPLACE.

APPLICATION IILED'NOV. 20, 1905.

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UNITED STATES PATENT OFFICE.

J OHANN G. WILHELM PAUL, OF SOHILTIGHEIM, AND JOSEPH THAU, OF STRASSBURG, GERMANY.

FIREPLACE- Specification of Letters Patent.

Patented Oct. 16, 1906.

To all whom it may concern:

Be it known that we, J OHANN GEoRe WIL- HELM PAUL, residing at N o. 1 Schlittweg, in Schiltigheim, and J OSEPH THAU, residing at N o. 9 Marktgasse, in Strassburg, in the Imperial Province of Alsace-Lorraine, German Empire, subjects of the King of Prussia, German Emperor, have invented a certain new and useful Improvement in Fireplaces, of which the following is a specification.

Our invention relates to that class of fireplaces in which air is introduced into the combustion-spaces above the bed of fuel by means of hollow blocks, the tapering air-passage of which serves to conduct air to the combustion-space.

The object of our invention is to provide means for preventing said hollow blocks from being overheated if one of the air-passages should be choked. To accomplish this obj ect, we employ hollow blocks which are provided in one wall with a recess and in the opposite wall with a corresponding projection or nipple communicating with the interior of the hollow blocks and adapted to engage one another when the blocks are set side by side, and thus forming a communication between all the blocks.

Referring to the drawings, Figure 1 shows in section a hollow block such as we employ according to the present invention. Fig. 2 represents the same block in side elevation. Fig. 3 shows two blocks setside by side on a support, the nipple of the one engaging the recess of the other. Fig. 4 shows the blocks applied to the furnace of a boiler, the respectwo parts of the same being shown in longitudinal section. Fig. 5 is a transverse vertical section on the line 6 7 of Fig. 4. i

By reference to Figs. 1 and 2 it will be seen that the hollow block a, the interior f of which is tapered from inlet to outlet and curved at the upper end, is provided with a shoulder and downward projections to rest on a suitable support g. In one of the side walls of this hollow block there is an opening 01 and in the opposite wall a nipple or projection a, the passage 6 of which discharges into the interior of the hollow block. When setting these blocks side by side, as shown in Fig. 3, the nipple c engages the recesses d, thus forming a continued communication throughout the series of blocks. Therefore if any of the air-passages of these blocks should be choked from beneath, so that air would stagnate in these blocks, the circulation of air is maintained, owing to the communication with the air-passage of the neighboring block, and a destructive overheating of the blocks may not happen.

As shown in Figs. 4 and 5, the hollow blocks in question may be employed, for instance, in connection with the furnaces of boilers, as Galloway or Lancashire boilers. The blocks a in this case may be arranged in two series at both sides of the grate e. The hot air passing from below through the grate also passes partially through the air-passages of the said blocks, mixing above the grate with the fire-gases and causing thus a complete combustion of the unburned portions of the same.

Having now described our invention, what We claim as new is In a stove or furnace, the combination of a combustion-chamber, a fuel-support situated therein, and a plurality of air-supply blocks, arranged to form the walls of the combustionchamber on opposite sides thereof, each of said blocks consisting of an upright body having a vertical air-passage inwardly curved and contracted at its upper end, a lateral hollow projection on one side thereof communicating with said air-passage and a corre sponding lateral aperture located in the opposite side thereof.

In witness whereof we have hereunto set our hands in presence of two witnesses.

Witnesses F. BALDNER, H. KUHN. 

